<template>
  <div>
    <!--    面包屑导航-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

<!--    卡片视图-->
    <el-card>

<!--      提示区-->
      <el-alert
              title="添加商品信息"
              type="info"
              center
              show-icon
              :closable = 'false'
      >

<!--        这是步骤条区-->
      </el-alert>
      <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

<!--     tab栏区域 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
        <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave" @tab-click="tabClickd">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                      v-model="addForm.goods_cat"
                      :options="cateList"
                      :props="cateProps"
                      @change="handleChange"></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
<!--            渲染表单的item项-->
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
<!--              复选框组-->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
<!--            action图片要上传的api地址-->
            <el-upload
                    :action="uploadURL"
                    :on-preview="handlePreview"
                    :on-remove="handleRemove"
                    list-type="picture"
                    :headers = "headerObj"
                    :on-success = "handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
<!--            富文本编辑器组件-->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

<!--    图片预览-->
    <el-dialog
            title="图片预览"
            :visible.sync="previewVisible"
            width="50%"
    >
      <img :src="previewPath" class="previewImg">
    </el-dialog>

  </div>
</template>

<script>
  import _ from 'lodash'
  export default {
    name: "Add",
    data(){
      return{
        //steps与tabs的联动
        activeIndex:'0',

        //添加商品
        addForm:{
          goods_name:'',
          goods_price:0,
          goods_weight:0,
          goods_number:0,
          //商品所属的分类数组
          goods_cat:[],
        //  图片的数组
          pics:[],
        //  商品详情描述
          goods_introduce:'',
          attrs:[]
        },
        addFormRules:{
          goods_name:[
            { required: true, message: '请输入商品名称', trigger: 'blur' },
          ],
          goods_price:[
            { required: true, message: '请输入商品价格', trigger: 'blur' }
          ],
          goods_weight:[
            { required: true, message: '请输入商品重量', trigger: 'blur' }
          ],
          goods_number:[
            { required: true, message: '请输入商品数量', trigger: 'blur' }
          ],
          goods_cat:[
            { required: true, message: '请选择商品分类', trigger: 'blur' }
          ]
        },
        //商品分类列表
        cateList:[],
        //级联选择器,显示值
        cateProps:{
          expandTrigger: 'hover',
          label:'cat_name',
          value:'cat_id',
          children:'children'
        },
        //获得的动态参数
        manyTableData:[],
        //获取动态属性
        onlyTableData:[],
      //  上传图片的url的地址
        uploadURL:'https://www.liulongbin.top:8888/api/private/v1/upload',
        //图片上传组件的headers请求头对象
        headerObj:{
          Authorization:window.sessionStorage.getItem('token')
        },
      //  预览图片的地址
        previewPath:'',
        previewVisible:false
      }
    },
    created() {
      this.getCateList()
    },
    methods:{
      //获取所有商品分类数据
      async getCateList(){
        const {data:res} = await this.$http.get('categories')
        if(res.meta.status !== 200) {
          return this.$message.error('获取商品分类数据失败')
        }
        this.cateList = res.data
      },
      //级联选择器改变的变换
      handleChange(){
        if(this.addForm.goods_cat.length !== 3){
          this.addForm.goods_cat = []
        }
      },
      //不允许没有完成上一项，就切换
      beforeTabLeave(activeName, oldActiveName){
        if(this.addForm.goods_cat.length !== 3 && oldActiveName === '0'){
          this.$message.error('请先选择商品分类！')
          return false
        }
      },
      async tabClickd(){
        //判断访问的是动态参数面板
        if(this.activeIndex === '1'){
          const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'many'}})
          if(res.meta.status !== 200 ){
            return this.$message.error('获取动态参数列表失败！')
          }
          res.data.forEach(item =>{
            item.attr_vals =
            item.attr_vals === 0 ?
            [] : item.attr_vals.split(' ')
          })
          this.manyTableData = res.data
          //  判断访问的是不是静态属性面板
        }else if(this.activeIndex === '2'){
          const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'only'}})
          if(res.meta.status !== 200 ){
            return this.$message.error('获取静态属性列表失败！')
          }
          this.onlyTableData = res.data
        }
      },
      //处理图片的预览结果
      handlePreview(file){
        console.log(file);
        this.previewPath = file.response.data.url
        this.previewVisible = true
      },
      //畜栏里图片的移除操作
      handleRemove(file){
        // console.log(file);
        const filePath = file.response.data.tmp_path
        const i =this.addForm.pics.findIndex(x =>
            x.pic === filePath
        )
        this.addForm.pics.splice(i,1)
        console.log(this.addForm);
      },
      //监听图片上传成功的事件
      handleSuccess(response){
        //1.先拼接得到一个图片信息对象
        const picInfo = {pic:response.data.tmp_path}
        //2.将图片信息对象，push到pics数组中
        this.addForm.pics.push(picInfo)
        // console.log(this.addForm);
      },
      add(){
        this.$refs.addFormRef.validate(async valid => {
          if(!valid) {
            return this.$message.error("请填写必要的表单项!")
          }
          //执行添加
          //lodash cloneDeep(obj) 深拷贝的对像,然后传到数据库是from
          const form = _.cloneDeep(this.addForm)
          form.goods_cat = form.goods_cat.join(',')
          //处理动态参数
          this.manyTableData.forEach(item => {
            const newInfo = {
              attr_id:item.attr_id,
              attr_value:item.attr_vals.join(' ')
            }
            this.addForm.attrs.push(newInfo)
          })
          //处理静态属性
          this.onlyTableData.forEach(item => {
            const newInfo = {
              attr_id:item.attr_id,
              attr_value:item.attr_vals,
            }
            this.addForm.attrs.push(newInfo)
          })
          form.attrs = this.addForm.attrs
          console.log(form)
          //发起请求添加商品,名称必须唯一的
          const {data:res} = await this.$http.post('goods',form)
          if (res.meta.status !== 201){
            return this.$message.error('添加商品失败')
          }
          this.$message.success('添加商品成功')
          this.$router.push('/goods')
        })
      }

    },
    computed:{
      cateId(){
        if(this.addForm.goods_cat.length === 3){
          return this.addForm.goods_cat[2]
        }
        return null
      }
    }
  }
</script>

<style lang="less" scoped>
  .el-checkbox{
    margin:0 10px 0 0 !important;
  }
  .previewImg{
    width: 100%;
  }
  .btnAdd{
    margin-top: 15px;
  }
</style>